Trademark attorney

William J. Cassin

United States

William J. Cassin (United States) is listed as the attorney or agent of record on 43 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
43
Still active
38
Registration rate
88%
Latest filingFirst in 1993
2026
Coverage

Where these filings were made

Each mark counts once here: an international registration is grouped with its country designations, not counted once per country.

By office

By classA mark can cover several classes

  • Class 42Computer and Scientific Services1433%
  • Class 20Furniture and Articles Not Otherwise Classified1126%
  • Class 37Building Construction and Repair1126%
  • Class 9Computers and Scientific Devices1023%
  • Class 40Treatment of Materials1023%
  • Class 39Transportation and Storage819%
  • Class 7Machines and Machine Tools614%
  • Class 11Environmental Control Apparatus614%

+22 more

Activity

Filings per year

New filings of record each year, counting each mark once.

Peak year · 8 filed
2026
2022 to 2026 · filed
21
First filing
1993

Filings by year: 1993: 1, 2003: 1, 2008: 2, 2009: 2, 2011: 3, 2013: 1, 2014: 2, 2015: 1, 2016: 1, 2017: 3, 2018: 1, 2020: 3, 2021: 1, 2023: 1, 2024: 7, 2025: 5, 2026: 8.

Clients

Companies on these filings

Owners on the latest 43 filings of record that Signa links to a company record.

10 more owners in these filings are not linked to a company record.

Filings

Latest filings of record

The most recent applications naming this attorney or agent.

Browse all filings
MarkStatusOfficeOwnerClassesFiled
500 AND GROWINGpending publicationUSPTO500 and Growing LLC25, 412026-05-05
[Design Mark]pending oppositionUSPTO500 and Growing LLC25, 412026-05-05
LEGACY LEGADOexaminingUSPTOLegacy Legado LLC412026-04-29
SAFTFLOregisteredUSPTORD Industries, Inc.202026-02-19
BOMBI MN XallowedUSPTOLocus Solutions IPCo, LLC12026-02-05
BOMBIMNXallowedUSPTOLocus Solutions IPCo, LLC12026-02-05
OBLYVIONallowedUSPTOLocus Solutions IPCo, LLC12026-02-05
OBLYVIONallowedUSPTOLocus Solutions IPCo, LLC12026-02-05
API

Get this data via the API

Every number on this page comes from the Signa API. Pull the same records into your own product with one request.

  • GET/v1/attorneys/{id}

    Attorney record, firm and filing stats

  • GET/v1/attorneys/{id}/analytics

    Filings by office, class and year

  • GET/v1/attorneys/{id}/trademarks

    Every trademark the attorney is of record on

Get API keyView docs
GET /v1/attorneys/{id}
ID=att_019d1a66-5982-779e-93f4-0fe341aecf50
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d1a66-5982-779e-93f4-0fe341aecf50",
  "object": "attorney",
  "name": "William J. Cassin",
  "firm_name": null,
  "country_code": "US",
  "trademark_count": 43
}